And I'm Possum.
Possum is helping me make some scrambled eggs for lunch.
Oh, I do love scrambled eggs.
Would you like me to stir the eggs for you, Sally?
Oh no, I'm not going to stir the eggs.
I'm going to use the egg beater.
You could use an electric beater for mixing, if you like, but I love this old egg beater.
Could I have a try?
You sure can Possum.
Oh, what's happened?
You've made a bit of a mess.
Well, I just wanted to see what it was doing, and I made a mess.
I'm sorry, Sally.
We can clean it up later.
What were you looking at?
Well, I was looking at this part.
It was spinning around and how these are the parts are spinning in a different direction.
It's a very clever thing, isn't it?
What you can see are the cogs.
That is one cog and there are two cogs at right angles to it.
So the main cogs spins the other two cogs around, using the teeth.
Oh and that's why the mixing blades are spinning.
You can go backwards and forwards.
You can turn them slow or fast.
Can I do it again, Sally?
Is that enough?
Yes, it looks nice and frothy.
I'm going to cook the eggs.
I won't be long.
What a lovely drawing of the cogs.
Oh, look at that.
You've drawn how they go together and how they rotate.
Can I add something to it?
Here you go.
I've drawn the arrows to show which way the cogs turn.
Sally, after I've had lunch, I'm going to go outside and see if I can find some cogs.
What a great idea Possum.
No, doesn't have any.
Where are some cogs?
Sally, come here.
What is it?
So, I've been looking around the yard, and I thought the wheelbarrow would have a cog but it doesn't.
No, it doesn't have one but then I thought of the bike, and come have a look.
Am I right?
Is this a cog?
Yes, you are right, Possum.
I never noticed that.
Your feet sit on the pedals and the pedals are attached to the cog.
Is that like the egg beater?
Yes, it is.
So when you pedal the bike, the cog turns around but this cog has got a chain that loops around it, and when the cog turns, the chain turns around too.
So, if the chain is turning that means there has to be a cog at the back that will turn too.
The chain makes the cog on the back wheel turn, and that's what makes the bike move forward but, Sally, there's one missing at the front.
That front wheel should have a cog too, shouldn't it?
Well, remember the wheelbarrow?
That doesn't have a cog, does it?
We steer it with our arms and it goes in the direction we want.
That's the same as the bike.
The back wheel pushes the bike forward and the front wheel is just for steering.
Oh, I love learning new things Sally.
Can I go tell Skip?
He'd love to hear what you've learnt.
I'm going to show him this.
Oh, yes, show him.
Come on in.
In you come Possum.
Hey Skip, look what I've got.
Skip, what are you thinking about?
I was thinking about lunch.
We've just had lunch.
Sally cooked me some scrambled eggs.
They were delicious.
Sorry, there's none left for you.
No, I wasn't thinking about eating lunch.
I was just thinking about when I used to work on the boats.
It was my job to look out for icebergs, and I'd have to sit up in the crow's nest and I'd have to let the captain know where to steer the ship.
Sitting up there was a very hungry job and they used to deliver my lunch to me.
The ship's cook organised a pulley system and they were able to hoist the lunch up to me in the crow's nest.
They had a bike wheel down one end, and with the rope, they'd be able to hoist my lunch all the way up so that I'd be able to eat my lunch in the crow's nest.
I just learned about an egg beater and how it has cogs, and how the cogs make the blades spin around.
Oh, you mean this Possum?
You try it.
The cogs are moving together to make the drill bit move.
That allows the drill bit to drill holes in the wood.
Oh, that's great.
I just learned as well that on a bike, you have pedals attached to a cog and then there's a chain that wraps around and goes to another cog at the back.
Then, when you push the pedals, the cogs move the back wheel.
Possum, you've done it.
I've been trying to work out how to make this gizmo work.
I've got plenty of old bike parts and now you've solved the problem for me and now we'll be able to assemble the pulley system.
What are we going to use to make it Skip?
Well, I've got the rope, I've got the pulley, I've got the wheel.
All I need is a cog to make it work.
Oh, Sally's here!
She'll be able to help us.
You've been playing with cogs!
I've been drawing this picture and I couldn't work out what I needed, and then Possum spoke about cogs and he's given me a great idea to assemble something.
Why don't we watch children learning about all sorts of different cogs?
I do love seeing children learning new things.
Alright, let's watch.
Oh, that was great.
I loved watching those children learning.
Now, I've got this tape measure.
Can you please Possum, from your tree, to Sally's door, can you measure the distance for me?
I can do that.
Now, Sally, while I'm doing that, you must help Skip, ok?
Aye aye Possum.
Right, now Sally.
Can you help me?
Can you bring this over for me?
Oh, he's back!
Now Possum, did you do the measurements?
Can you tell them to Sally please?
From my tree to your house, Sally, is six metres.
Skip, why did you need to know the distance?
Well, before, when we were having that conversation about lunch, it gave me an idea about making something special for you.
In case it's a rainy day and you don't want to leave your treehouse, and if Sally doesn't want to go out in the rain to bring you some lunch, we can use this to deliver it to you.
Do you mean this is for my tree?
Oh, how great!
I'm so excited!
Hang on Possum.
You can't use it every day, ok?
Only sometimes but it will be good fun.
I'll show you what happens.
We've already made it, so this is what we're going to do.
We've got a cog here that, as I twist the pedal, the cog will move the wheel.
Now, that's attached to the rope, and it will pull it all across.
So, you pull it.
Lunch is ready.
Would you like to do it Sally?
Are you ready up there, Possum?
Come on, come on.
Down you go.
Off you go.
Oh, yum, yum, yum, yum, yum.
Oh, bring it back up.
There you go.
Oh, this is great.
Today we learned so much about cogs and how they can be used, like this pulley system.
Well, our time is up.
Thanks for watching.
See you next time.
Bring it up again.
OK, let's give it a little bit of a tune-up.
Look at this… Possum's hand is going in this direction, but the egg-beater is turning a different way. What wonderful things cogwheels are.